High-low strain dynamic pile testing instrument with improved buffer structure

Abstract

The utility model relates to the technical field of foundation pile dynamic testing instrument, disclose high and low strain foundation pile dynamic testing instrument with improved buffer structure, including mounting bracket and instrument body, the inside of mounting bracket is provided with instrument body. This high and low strain foundation pile dynamic testing instrument with improved buffer structure carries and uses, and the both sides of the rear end in mounting bracket interior are fixed with buffer spring respectively, and the buffer spring of two groups that sets up can carry out the supplementary buffer offset of the up and down vibration of instrument body in the carrying process, reduce the vibration of instrument body main body in the carrying movement process, carry out buffer protection, also can be respectively on the upper connecting plate of the rear end both sides of instrument body, after the second knob is rotated out from the inside of the screw hole back, instrument body can be removed and disassembled from the inside of mounting bracket upwards, single use, solve the inconvenient buffer protection of foundation pile testing instrument carrying and use problem.

Description

Technical Field

[0001] This utility model relates to the technical field of dynamic pile testing instruments, specifically a dynamic pile testing instrument with an improved buffer structure for high and low strain. Background Technology

[0002] As a crucial part of the building construction process, pile foundations require quality inspection after completion. Inspections assess the pile foundation's bearing capacity, test the concrete quality to verify compliance with standards, inspect the grouting process, identify potential quality issues, and implement appropriate remedial measures to ensure project quality. High and low strain dynamic pile testing instruments are essential for pile quality inspection.

[0003] The high and low strain pile dynamic tester is a precision instrument used to detect and determine the axial compressive bearing capacity and structural integrity of piles, as well as to monitor the tensile and compressive stresses and process parameters during pile driving. It is widely used in the testing process of pile foundations.

[0004] However, when using the high and low strain pile dynamic testing instrument, because the pile tester is a precision instrument, it is easy to generate large vibrations when carrying it by hand or in a vehicle. After being directly transmitted to the pile tester, it is easy to damage the precision detection components inside the pile tester. Therefore, it is insufficient and does not have buffer protection measures when carrying and using the pile tester.

[0005] Now, a novel dynamic testing instrument for high and low strain foundation piles with an improved buffer structure is proposed to address the above-mentioned shortcomings. Utility Model Content

[0006] The purpose of this invention is to provide a dynamic testing instrument for high and low strain foundation piles with an improved buffer structure, so as to solve the problem mentioned in the background art of inconvenience in buffering and protecting the foundation pile testing instrument when it is carried and used.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a dynamic testing instrument for high and low strain foundation piles with an improved buffer structure, comprising a mounting frame and an instrument body. The instrument body is housed inside the mounting frame. Lower connecting plates are fixedly mounted on both sides of the rear end of the mounting frame, and a buffer spring is fixed to the top of the lower connecting plates. Upper connecting plates are provided on both sides of the top rear end of the instrument body. A damper is provided inside the buffer spring. A second knob is provided at the rear end of the upper connecting plate. Screw holes are provided on both sides of the top rear end of the instrument body. Sliding rods are vertically fixed on both sides of the bottom end of the mounting frame. Sliding sleeves are fixed at the middle positions of both sides of the rear end of the instrument body.

[0008] As a further technical solution of this utility model, the top end of the buffer spring is fixedly connected to the bottom end of the upper connecting plate, the top end of the damper is fixedly connected to the bottom end of the upper connecting plate, the bottom end of the damper is fixedly connected to the top end of the lower connecting plate, and the buffer spring is symmetrically arranged about the vertical center line of the instrument body.

[0009] As a further technical solution of this utility model, the front end of the second knob penetrates the interior of the upper connecting plate, the exterior of the second knob is provided with an external thread, and the top end of the slide rod penetrates the interior of the slide sleeve.

[0010] As a further technical solution of this utility model, the bottom end of the mounting frame is provided with a fixing column, and the top end of the fixing column is welded and fixed with a mounting plate. The top end of the outside of the fixing column is welded and fixed with a fixing sleeve, and the outside of the fixing sleeve is welded and fixed with a fixing frame. The outside of the fixing column is provided with a vertical support leg, and the bottom end of the support leg is hinged with a backing plate. The top end of the support leg is welded and fixed with a fixing head. The left side of the fixing frame is provided with a screw rod, the right side of the fixing frame is provided with a washer, and the right side of the washer is provided with a locking ring. The two sides of the bottom end of the mounting frame are respectively welded and fixed with threaded rods, and the two sides of the bottom end of the mounting plate are respectively provided with locking rings.

[0011] As a further technical solution of this utility model, the bottom end of the lead screw penetrates the interior of the mounting plate, and the interior of the locking ring is provided with an internal thread that mates with the external thread of the lead screw.

[0012] As a further technical solution of this utility model, the right side of the screw passes through the interior of the fixing frame and the fixing head respectively, and the fixing frame and the support leg are respectively arranged in three sets at equal intervals in a ring on the outside of the fixing sleeve.

[0013] As a further technical solution of this utility model, protective sleeves are respectively provided on both sides of the outer side of the instrument body, and a first knob is respectively provided through the top and bottom of the protective sleeve. Threaded holes are respectively opened inside the top and bottom of both sides of the instrument body. Multiple sets of protruding strips are fixed at equal intervals on the instrument body. The protruding strips and the instrument body are made of silicone material.

[0014] As a further technical solution of this utility model, a test wire harness is provided on the left side of the mounting bracket, and a connector is fixedly installed on the left side of the top of the instrument body.

[0015] Compared with the prior art, the beneficial effects of this utility model are: the high and low strain pile dynamic testing instrument with improved buffer structure not only realizes the buffer protection when the pile testing instrument is carried and used, and realizes the auxiliary support and fixation of the pile dynamic testing instrument, but also realizes the convenient external protection of the pile dynamic testing instrument.

[0016] (1) The instrument is equipped with a mounting frame, instrument body, slide bar, lower connecting plate, buffer spring, damper, upper connecting plate, second knob, screw hole and sliding sleeve. When the dynamic measuring instrument is carried and used, buffer springs are installed and fixed on both sides of the rear end of the mounting frame. The two sets of buffer springs can assist in buffering and offsetting the up and down vibration generated during the carrying of the instrument body, reducing the vibration caused to the main body of the instrument body during the carrying movement, and facilitating buffer protection when the dynamic measuring instrument is carried and moved. When the pile dynamic measuring instrument is used, the second knobs can be turned out from the inside of the screw hole on the upper connecting plate on both sides of the rear end of the instrument body, and the instrument body can be moved out from the inside of the mounting frame and disassembled to switch to independent use.

[0017] (2) By setting up a mounting frame, instrument body, fixing sleeve, back plate, support leg, fixing column, screw, mounting plate, locking ring, threaded rod, fixing frame, fixing head, washer and locking ring, when the pile dynamic tester is used, the two sets of threaded rods can be inserted through the inside of the mounting plate at the bottom of the mounting frame, and the locking ring can be screwed into the outside of the threaded rod to fix the fixing column and the mounting frame. Then, the three sets of back plates and support legs can be used to support and fix the mounting frame and the instrument body on the ground without hand. At the same time, when the three sets of support legs are used for support, the locking ring can be loosened outside the screw. After the support leg is unlocked at the position outside the fixing column, the support leg can be moved up and down. With the hinged installation of the back plate, the support and fixing height of the mounting frame and the instrument body can be adjusted, which is convenient for auxiliary support and fixing of the pile dynamic tester.

[0018] (3) The instrument body, first knob, protective sleeve, threaded hole and convex strip are provided. When the pile dynamic tester is used, protective sleeves are installed and fixed on both sides of the instrument body. The two sets of protective sleeves can provide auxiliary protection against collisions and impacts to the outside of the instrument body, reducing damage to the outside of the instrument body. At the same time, multiple sets of convex strips are set at equal intervals on one side of the protective sleeve. When holding the instrument body, they can play a role in preventing slipping and facilitate the protection of the outside of the pile dynamic tester. Attached Figure Description

[0019] Figure 1 This is a frontal cross-sectional view of the present invention.

[0020] Figure 2 This is a side view of the buffer spring structure of this utility model;

[0021] Figure 3 This is a top view schematic diagram of the sliding sleeve structure of this utility model;

[0022] Figure 4 This is a top-view enlarged structural diagram of the fixing sleeve of this utility model.

[0023] In the diagram: 1. Support plate; 2. Support leg; 3. Fixing column; 4. Fixing sleeve; 5. Mounting bracket; 6. Protective sleeve; 7. Test wiring harness; 8. Instrument body; 9. First knob; 10. Connector; 11. Threaded hole; 12. Raised bar; 13. Slide rod; 14. Mounting plate; 15. Locking ring; 16. Lead screw; 17. Lower connecting plate; 18. Buffer spring; 19. Damper; 20. Upper connecting plate; 21. Second knob; 22. Screw hole; 23. Slide sleeve; 24. Screw; 25. Fixing bracket; 26. Fixing head; 27. Washer; 28. Locking ring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-4 A dynamic testing instrument for high and low strain foundation piles with an improved buffer structure includes a mounting frame 5 and an instrument body 8. The instrument body 8 is installed inside the mounting frame 5. Lower connecting plates 17 are fixed on both sides of the rear end of the mounting frame 5, and a buffer spring 18 is fixed on the top of the lower connecting plate 17. Upper connecting plates 20 are installed on both sides of the top of the rear end of the instrument body 8. A damper 19 is installed inside the buffer spring 18. A second knob 21 is installed at the rear end of the upper connecting plate 20. Screw holes 22 are opened on both sides of the top of the rear end of the instrument body 8. Sliding rods 13 are vertically fixed on both sides of the bottom end of the mounting frame 5. Sliding sleeves 23 are fixed at the middle positions of both sides of the rear end of the instrument body 8. A test wire harness 7 is installed on the left side of the mounting frame 5. A connector 10 is installed and fixed on the left side of the top of the instrument body 8.

[0026] The top end of the buffer spring 18 is fixedly connected to the bottom end of the upper connecting plate 20, the top end of the damper 19 is fixedly connected to the bottom end of the upper connecting plate 20, and the bottom end of the damper 19 is fixedly connected to the top end of the lower connecting plate 17. The buffer spring 18 is symmetrically arranged about the vertical center line of the instrument body 8. The front end of the second knob 21 passes through the interior of the upper connecting plate 20, and the exterior of the second knob 21 is provided with external threads. The top end of the slide rod 13 passes through the interior of the slide sleeve 23. The damper 19 reduces the vibration amplitude of the object by consuming vibration energy. It works with the buffer spring 18 to absorb the vibration of the pile dynamic measuring instrument during the carrying process. Depending on the actual needs, the damper 19 can be a hydraulic damper, a viscoelastic damper, etc. The appropriate specification of the damper 19 is selected and installed according to the size of the mounting frame 5 and the instrument body 8.

[0027] Specifically, such as Figures 1-3 As shown, buffer springs 18 are fixed on both sides of the rear end inside the mounting frame 5. The two sets of buffer springs 18 can assist in buffering and offsetting the vertical vibration generated during the carrying of the instrument body 8, reducing the vibration caused to the main body of the instrument body 8 during the carrying process. This facilitates buffer protection when carrying and moving the dynamic testing instrument. At the same time, during the carrying process, the pile dynamic testing instrument will be subjected to various vibrations. If these vibrations are directly transmitted to the instrument body 8, they can easily damage the internal precision detection components. When the dynamic testing instrument is subjected to vibration, the elastic deformation of the buffer springs 18 and the energy consumption of the damper 19 absorb and disperse the vibration energy, reducing the impact of vibration on the instrument body. The instrument body is protected from impact, thus protecting internal components from damage. When the dynamic testing instrument is performing testing, the buffer spring 18 is in a relatively static state. At this time, the dynamic testing instrument is connected to the foundation pile through the test cable 7. By striking the top of the foundation pile, a stress wave is generated. The stress wave propagates along the direction of the foundation pile. The dynamic testing instrument obtains test data based on the one-dimensional elastic rod stress wave fluctuation theory. It is worth noting that the above-mentioned buffer structure will not interfere with the detection principle and signal acquisition of the dynamic testing instrument during this process. It only plays a protective role during the carrying process and is independent of the detection function of the dynamic testing instrument. There is no essential conflict between them. It can effectively protect the dynamic testing instrument without affecting its normal detection function.

[0028] The mounting bracket 5 has a fixed post 3 at its bottom end, and a mounting plate 14 is welded to the top of the fixed post 3. A fixed sleeve 4 is welded to the top of the outside of the fixed post 3, and a fixed frame 25 is welded to the outside of the fixed sleeve 4. A support leg 2 is vertically arranged on the outside of the fixed post 3, and a backing plate 1 is hinged to the inside of the bottom end of the support leg 2. A fixed head 26 is welded to the top of the support leg 2. A screw 24 is arranged on the left side of the fixed frame 25, and a washer 27 is arranged on the right side of the fixed frame 25. A locking ring 28 is arranged on the right side of the washer 27. A lead screw 16 is welded to both sides of the bottom end of the mounting bracket 5. A locking ring 15 is arranged on both sides of the bottom end of the mounting plate 14. The bottom end of the lead screw 16 passes through the inside of the mounting plate 14. The inside of the locking ring 15 is provided with an internal thread that mates with the external thread of the lead screw 16. The right side of the screw 24 passes through the inside of the fixed frame 25 and the fixing head 26. The fixed frame 25 and the support leg 2 are arranged in three sets at equal intervals in a ring on the outside of the fixed sleeve 4.

[0029] Specifically, such as Figure 1 and Figure 4 As shown, two sets of lead screws 16 can be inserted through the interior of the mounting plate 14 at the bottom of the mounting frame 5, and the locking ring 15 can be screwed into the outside of the lead screws 16 to fix the fixing column 3 to the mounting frame 5. Then, the mounting frame 5 and the instrument body 8 can be fixed to the ground with auxiliary support using three sets of abutment plates 1 and support legs 2, without the need for hand-holding.

[0030] The instrument body 8 is provided with protective sleeves 6 on both sides of the outside, and the top and bottom of the protective sleeves 6 are respectively provided with first knobs 9. The top and bottom of both sides of the instrument body 8 are respectively provided with threaded holes 11. Multiple sets of protrusions 12 are fixed on the instrument body 8 at equal intervals. The protrusions 12 and the instrument body 8 are made of silicone.

[0031] Specifically, such as Figure 1 As shown, protective sleeves 6 are installed and fixed on both sides of the instrument body 8. The two sets of protective sleeves 6 can provide auxiliary protection against collisions and impacts to the outside of the instrument body 8, reducing damage to the outside of the instrument body 8. At the same time, multiple sets of protruding strips 12 are evenly spaced on one side of the protective sleeves 6, which can play a role in preventing slippage when holding the instrument body 8.

[0032] Working Principle: When this utility model is carried and used, buffer springs 18 are installed and fixed on both sides of the rear end inside the mounting frame 5. The two sets of buffer springs 18 can assist in buffering and offsetting the vertical vibration generated during the carrying of the instrument body 8, and provide buffer protection for the dynamic testing instrument during carrying and moving. When using the pile dynamic testing instrument, the second knobs 21 on the upper connecting plates 20 on both sides of the rear end of the instrument body 8 can be turned out from the inside of the screw holes 22 to remove the instrument body 8 from the inside of the mounting frame 5 and disassemble it for independent use. At the same time, when the pile dynamic testing instrument is used for testing, two sets of screw rods 16 can be inserted through the inside of the mounting plate 14 at the bottom of the mounting frame 5, and the locking rings 15 can be screwed into the outside of the screw rods 16 to fix them. The column 3 is fixed to the mounting frame 5. Then, the mounting frame 5 and the instrument body 8 can be further supported and fixed to the ground using three sets of abutment plates 1 and support legs 2, eliminating the need for handheld use. When using the pile dynamic testing instrument, protective sleeves 6 are installed and fixed on both sides of the instrument body 8. The two sets of protective sleeves 6 can provide auxiliary protection against collisions and impacts to the outside of the instrument body 8. At the same time, multiple sets of protruding strips 12 are evenly spaced on one side of the protective sleeves 6, which can play a role in preventing slippage when holding the instrument body 8. During testing, the right side of the test harness 7 is connected to the connector 10, and the bottom end of 7 is glued and fixed to the pile. Then, the top of the pile is struck to generate stress waves in the pile foundation. The stress waves propagate through the pile foundation and along the pile foundation direction. Finally, the test data is obtained according to the one-dimensional elastic rod stress wave fluctuation theory.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A dynamic testing instrument for high and low strain foundation piles with an improved buffer structure, comprising a mounting frame (5) and an instrument body (8), characterized in that: The mounting bracket (5) contains an instrument body (8). Lower connecting plates (17) are fixed on both sides of the rear end of the mounting bracket (5), and a buffer spring (18) is fixed at the top of the lower connecting plate (17). Upper connecting plates (20) are set on both sides of the top of the rear end of the instrument body (8). A damper (19) is set inside the buffer spring (18). A second knob (21) is set at the rear end of the upper connecting plate (20). Screw holes (22) are opened on both sides of the top of the rear end of the instrument body (8). Slide rods (13) are vertically fixed on both sides of the bottom end of the mounting bracket (5). Sliding sleeves (23) are fixed at the middle positions of both sides of the rear end of the instrument body (8).

2. The dynamic testing instrument for high and low strain foundation piles with an improved buffer structure according to claim 1, characterized in that: The top end of the buffer spring (18) is fixedly connected to the bottom end of the upper connecting plate (20), the top end of the damper (19) is fixedly connected to the bottom end of the upper connecting plate (20), the bottom end of the damper (19) is fixedly connected to the top end of the lower connecting plate (17), and the buffer spring (18) is symmetrically arranged about the vertical center line of the instrument body (8).

3. The dynamic testing instrument for high and low strain foundation piles with an improved buffer structure according to claim 1, characterized in that: The front end of the second knob (21) penetrates the interior of the upper connecting plate (20), and the exterior of the second knob (21) is provided with an external thread. The top end of the slide rod (13) penetrates the interior of the slide sleeve (23).

4. The dynamic testing instrument for high and low strain foundation piles with an improved buffer structure according to claim 1, characterized in that: The mounting bracket (5) has a fixed post (3) at its bottom end, and a mounting plate (14) is welded and fixed to the top of the fixed post (3). A fixed sleeve (4) is welded and fixed to the top of the outside of the fixed post (3), and a fixed frame (25) is welded and fixed to the outside of the fixed sleeve (4). A support leg (2) is vertically arranged on the outside of the fixed post (3), and a backing plate (1) is hinged to the bottom of the support leg (2). A fixed head (26) is welded and fixed to the top of the support leg (2). A screw (24) is arranged on the left side of the fixed frame (25). A washer (27) is arranged on the right side of the fixed frame (25), and a locking ring (28) is arranged on the right side of the washer (27). A lead screw (16) is welded and fixed to both sides of the bottom end of the mounting bracket (5). A locking ring (15) is arranged to both sides of the bottom end of the mounting plate (14).

5. A dynamic testing instrument for high and low strain foundation piles with an improved buffer structure according to claim 4, characterized in that: The bottom end of the lead screw (16) penetrates the interior of the mounting plate (14), and the lock ring (15) is provided with an internal thread that mates with the external thread of the lead screw (16).

6. A dynamic testing instrument for high and low strain foundation piles with an improved buffer structure according to claim 4, characterized in that: The right side of the screw (24) passes through the interior of the fixing frame (25) and the fixing head (26), and the fixing frame (25) and the support leg (2) are respectively arranged in three sets at equal intervals in a ring on the outside of the fixing sleeve (4).

7. A dynamic testing instrument for high and low strain foundation piles with an improved buffer structure according to claim 1, characterized in that: The instrument body (8) is provided with protective sleeves (6) on both sides of the outside, and the top and bottom of the protective sleeves (6) are respectively provided with first knobs (9). The top and bottom of both sides of the instrument body (8) are respectively provided with threaded holes (11). Multiple sets of protrusions (12) are fixed on the instrument body (8) at equal intervals. The protrusions (12) and the instrument body (8) are made of silicone.

8. A dynamic testing instrument for high and low strain foundation piles with an improved buffer structure according to claim 1, characterized in that: A test wiring harness (7) is provided on the left side of the mounting bracket (5), and a connector (10) is installed and fixed on the left side of the top of the instrument body (8).

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